Lockbox



FIG. 1 is front perspective view of a lockbox showing my new design;

FIG. 2, is a bottom perspective view of the lockbox thereof;

FIG. 3, is a front view thereof;

FIG. 4, is a rear view thereof;

FIG. 5, is a left side view thereof;

FIG. 6, is a right view thereof;

FIG. 7, is a top view thereof; and,

FIG. 8, is a bottom view thereof.

The portions of the Figures shown in phantom lines or broken lines are for illustrative purpose only and form no part of the claimed design. 

CLAIM The ornamental design for a lockbox, as shown. 